For A level Mathematics students will require a calculator that can calculate Binomial and Normal probabilities directly from values. The minimum standard for this is an advanced scientific calculator, such as the Casio 991EX ClassWiz or the TI-30X Pro; however, graphical calculators have this facility along with the additional advantage of being able to plot the graphs of functions. Graphing tools should be permeating the study of A level and integrating graphical calculators into the teaching and learning is a very effective way of achieving this.
OCR have produced guidance on the use of technology as part of special access arrangements for mathematics assessment. This includes guidance on how an emulator or other software, such as Autograph, GeoGebra or Desmos, can be used in place of a calculator. For more details see: The use of computer technology as part of special access arrangements for mathematics assessment.
We have produce Detailed advice for integrating Casio graphical calculators into the study of A level Mathematics: Casio tasks